Portable electric automatic sawing-machine.



w. GHALAPP.; PORTABLE ELECTRIC AUTOMATIC S AWING' MACHINE.

APPLICATION HLED lULY 24, 1914- PtentedJune 29,1915.

4 SHEETS-SHEET 1L HHBTTTTWH" Q W. GRALAPP.

PORTABLE ELECTRIC AUTOMATIC SAWING MACHINE.

APPLICATION FLLED JULY 24, 1914- Patented June 29, 1915.

4 SHEETS-SHEET 3 w. GHALAPP. PORTABLE ELECTRTC AUTOMATIC SAWING MACHINE.

Fig. 51 Q APPLICATION FILED JULY 24,1914.

Patente June 29, 1915.

4 SHEETS-SHEET 4.

warms-rt GBALAPP, or wfirrnnnnns; Wisconsin.-

PORIABLE ELECTRIC AUTOMATIC SAY- ING-lnLAIIHINE.

Specification of Letters Patent. Patented June 29, 1915.

a seauen-meo Juiyfl 1914. Serial restatem- To all whom it may concern:

Be it known that I, .VVALTER GRAI .AP1.& citizen of the United States, residing at WVittenberg, in the county of Shawano and State of Wisconsin, have invented new and useful Improvements in Portable Electric Automatic Sawing-Machines of which the following is a specification.

The invention relates to a portable sawing machine designed particularly for log sawing, and constructed with a View to providing for the proper reciprocation of the saw and for the adjustment of the sawing machine in accordance with the conditions.

The main object of the present invention is the provision of a sawing machine involving a frame on which the parts are supported, the saw being reciprocated for the sawing operation, and limited to any desired cutting depth a log gripping element being provided for securing one end of the frame with respect to the log.

The invention in the preferred form of details will be described in the following specification, reference being bad particu larly to the accompanying drawings, in which:-

Figure l is a view in elevation, showing the improved machine. Fig. 2 is a similar view taken from the opposite side. Fig. 3

e is an enlarged side elevation, similar to Fig.

l, with the saw and motor omitted. F ig. a is a top plan of the machine. Fig. 5 is an elevationof-thedetail illustrating the log gripping means. Fig. 6 is a top plan of the same. Fig. 7 is a section on line 7-7 of Fig. Fig. 8 is a section on line 88 of Fig. Fig. 9 is a section on line 9-9 0 Fig. Fig. 10 is a section on line 1010 of Fig. 3. Fig. 11 is a section on line 11-11 of Fig. 4. Fig. 12 is an enlarged section on the line 1212 of Fig. 7. Fig. 13 is a detail view of the holding member.

The present improvement comprises a main frame 1, preferably of channel construction andprovided at one end with :1

"plate extension 2 having an intermediate portion 3 extended in parallel relation to, but offset from the plane of the main frame, the plate 2 also having a lateral portion .1 projected at right angles to the plane of the main frame for a purpose which will later appear. The portion 3 of the plate pivotally supports the saw frame 5, which latter is alsocf channel construction. The saw frame is connected to the plate-2 through the medium of a bracket 6, which-bracket comprises anapproximately rectangular hollow section" 7 and to the outer surface of which the saw frame 5 is bolted or otherwise secured, a tie plate 8 with the central inset portion 9 bridging the opening in the bracket section 7 from the inner side. The inset portion 9 of the tie plate is spaced from the inner surface of the bracket portion 7 a suflicient distance to permit the insertion therebetween of the portion 3 of the plate 2, and a pivot bolt 10 unites the parts at this point, whereby the saw frame 5 is pivotally connected to the plate 2 and by reason of the rigid connection between the latter and the main frame 1, the saw frame will he supported by the main frame and may-swing relatively thereto.

Supported in brackets 11 projecting from the saw frame is a motor 12, to which cur rent is supplied in any approved or desired manner. The armature shaft carries pinion 13 arranged to mesh with the gear 14-. mounted on the auxiliary shaft supported inone of the brackets 11 and the saw frame the shaft on the inner side of the frame or that side opposite the motor, being provided with a sprocket 15: A sprocket chain 16 connects the sprocket 15 with the sprocket 17 mounted upon the saw frame in aline ment with and some; distance from the sprocket 15, and one link pin of the sprocket chain is extended as at 18 to provide for the connection therewith of a p'itman rod 19, which rod, by reason of its connection with the chain, is compelled to travel a reciprocatory path in the movement of the chain about the sprockets. A guide frame 20 is slidably mounted upon the saw frame 5, being provided with edge extensions 21 at remote points to slidably impress the respective edges of the saw frame. is connected to'tlie frame 20 so that the latter reciprocates therewith, being guided by the saw frame previously described. The saw 22 is connected to the-frame 20, so as to move in unison with the latter.

Seburcd upon the main frame 1 is a clamp bracket 23 formed with a vertical opening to receive a limiting member 24, the letter being secured in adjusted position transverse the main frame by a set screw 25. The limiting member has a lateral foot 26 arranged to l'lnd ll'linwlillfl saw frame,- and the saw- The pitman 19 frame is provided with an upwardly extending laterally projecting stop arm 27,

the terminal end 28 ofwhichmoves 1n 'th path to be'intercepted by the end of the foot 5 '26 so as. to limit the descent of the saw frame. The limiting member'2 i is preferably-provided with a series of graduations as shown in Fig. 2,-whereby to accurately determine the cutting depth of the saw as may be desired. The main frame 1 is further provided with aholding member 29 projecting vertically therefrom approxlmately in line with the forward end of the saw frame,said member 29 extending above the main frame and having its terminal downwardly curved to provide a spring section 30 in which, at an appropriate point, is formed an opening 31. A spring locking dog 32 is mounted upon the saw frame in position to engage the opening 31. There is thus provided a means whereby when the saw is not desired for immediate use, it may be elevated and throu h the use of the dog locked in such elevate position until its use is desired. v

The main frame is provided with means whereby the rear end thereof is adjustably supported and the forward end disposed for gripping cooperation with the log; In providing the rear support, I arrange an. up-

right 33 adapted to rest upon the surface of the ground and formed at the upper end in the'horizontal bearing opening 3st in which is arranged a bushing 35 adapted to be se 35 cured by a set screw 36. A bolt 37 extends through the bushingjand is adapted to be clamped in fixed relation by a wing nut 38, the head end of the bolt passing through a supportingarm 39. The arm is thus mount- 49 edfor various adjustments with respect to the upright, as will be obvious from the connectionidescribed, and as more particularly illustrated in Fig. 8. The edgev of the arm 39 isfor'med' with: a series of notches 40 and the main; frame is adapted for adjustment longitudinally of the arm. to regulate the height of said frame. In providing for such adjustment, the section 4 of the plate 2 is vformed with an opening ltoreceive a boss I 42 extending from the guide block 43,which "block is formed with an opening {M to slidably receive the arm 39. A locking screw 45 is threaded-into an opening 46 in the guide block and provided with an operating handie 47 which "overlies andtbears upon the section 4 of the plate 2, whereby the block is locked with relation to the plate when desired. A locking key .48 is'movable in the block, being formed with a lateral terminal 49 operating in the ,"opening -50 formed in the block andada-pted to' engage any one of the notches 40 in the. arm 39. The end of the key extends beyond the block and is threaded for the rece' tion of the nut, 51.

by this construction, t e frame 1 may be se-' at any angular relation to the uprights The opposite end of the main frame 1 -1s provided with means whereby the sawing machine may be supported, from the log on the like, said means being designed to grip "cured in any desired position lengthwise the arm 39, and the latter may be ad usted.

or bite into the log. To this end, I provide amain frame witha'n extension plate 52 on which is pivotally supported a gripping dog .53 having terminal 130111138170 take into the. log. The pivots'ofthe dogs are formed to provide interengaging pinions 54, where-' by dogs are simultaneously operated. One

of the dogs is provided with an arm 55 to which is connected an extension coilspring Lao,

56. The opposite endiof'the spring is conw nected by a link 57 with an angle lever 58, 1

the lever being pivoted at 60 on the upright from the main frame. The angular relation of the lever tensions to ho d the lever in either set or re; leased position,- the movement of'the lever arts is such that the spring into set position drawing upon the spring I to cause the dogs to' bite into the log, as

clearly shown in Fig. 2. The end of the extension 52 is provi d with an .upright 61 connected by a spring 62 with the arm 55,

the spring 62 acting in opposition to the spring 56. The upper end of the upright 61 is provided with guide rollers -63 between which the upper edge of the saw is guided in movement.

From the above description, the operation of the device will be fully and clearly apparent, the various adjustments hereinbefore f described permitting a range of utility not":

ordinarily incident to structures of this type. It will be understood that the improved sawing machine is primarily designed for usuallyserviceable in sawing with the material in vertical position,and furthermore in sawing the tree or log at a point close tojthe! ground surface.

What is claimed is 1. A portablesawing machine'comprisinga main frame, means for securing one'end. of said main frame to a log, an uprlght (11sosed adjacent to the remaining end of said rame and adapted to rest upon the ground and having the upper end thereofformed to j provide a horizontal bearing opening, a bushing within said opening, a bolt pro ecting through said bushing, a. vertical supi portin arm having the upper'end thereof secure to one .end of said bolt and depend- '2 ing therefrom, an adjustable connection be adjacent.

tween saidsupporting arm and theend of the frame whereby the ele vation of the frame may-be varied, and means holding i said bolt in saidbushing and the saw carrying frame connected to said main frame.

2. A portable sawing machine comprising a main frame, meansfor securing one end of said main frame to a log, an upright disposed adjacent to the remaining end of said frame and adapted to rest upon the ground andhaving the upper end thereof formed to provide a horizontal bearing opening, a bushing Within said opening, a boltprojecting through said bushing, a vertical supporting arm having the upper end thereof secured-to one end of said bolt and depending therefrom, an adjustable connection between said supporting arm and the adjacent end of the frame whereby the elevation of the frame may be-varied, meansholding said bolt in said bushing and the saw carrying frame connected to said main .frame, and means holding said bushing against turning movement in the opening in said upright.

3. A portable sawing machine comprising a mainframe, means for securing one end of said main frame to a log, an upright disposed adjacent to the remaining end of said frame and adapted to rest upon the ground and having the upper end thereof formed to provide a horizontal bearing opening, a

- bushing, a vertical supporting arm having the upper end thereof secured to one end of said jbolt'and depending therefrom, a plate connected to the adjacent end of said frame and extending outwardly therefrom and having the outer end thereof formed with an opening, a guide block having a boss formed thereon projecting through the opening in" said plate, means holding said -boss withinthe opening in said plate, .said-bbckb'eing' also formed with a'vertical opening to fslidadapted to grip the work, means supporting the remaining end of said frame, a saw carrying frame pivoted upon said main frame and capable of vertical swinging movement, ',a stop arm secured to said saw carrying frame and projecting upwardly and laterv ally therefrom, a clampbraoket secured to said main frame and formed with a vertical opening, a limiting member slidably mounted within said opening, a lateral foot on the lower end of said limiting member disposed in the. path of movement of said stop arm and adapted to be engagedthereby to limit the downward movement of the saw car ing frame, and means for holding said limiting member in adjusted position in the slot in said clamp bracket. I

In testimony whereof I aflix my signature in presence of two Witnesses,

j I WALTER GRALAPP.

lVitnesses; v E

P. G. SGHLYTTER, W. E. Wilson. 

